An input capacitor is not required for stability except when the device maximum current is sourced from the MID_OUT pin. However, adding an input capacitor is always good analog design practice to counteract reactive input sources and improve transient response, input ripple, and PSRR. Starting with the nominal input capacitor value is required if large, fast transient load or line transients are anticipated on the MID_OUT pin or if the device is located several inches from the input power source.

A minimum of a 3:1 capacitor ratio between C_{MID_OUT} and C_OUT is required for proper operation of the TPS7A43 LDO and a 4.7-μF capacitor can be connected from the MID_OUT pin to GND.

A minimum 1-μF output capacitor is required for V_OUT stability. A maximum 100-μF output capacitor can be used as long as the 3:1 ratio between C_{MID_OUT} and C_OUT is maintained.